NETWORK ADDRESS TRANSLATION

AIM To configure Static and Dynamic NAT between the Routers and Computers

PROCEDURE

1)    Create a topology using 2 Routers and 2 Computers for Static NAT

2)    Create a topology using 2 Routers and 2 Computers for Dynamic NAT

3)    Configure IP address to routers go to global configuration mode in R1 and R2 configure connected interfaces

4)    Assign IP address for both Pc's with appropriate IP and subnet mask and default gateway

5)    Configure both router with Static and Dynamic NAT

6)    Double click PC move to desktop then command prompt give the command ping

STATIC NAT – TOPOLOGY CONFIGURATION

ROUTER 0

Router> enable

Router# show ip interface brief

Router# configure terminal

Router(config)# interface fastethernet 0/0

Router(config-if)# ip address 10.0.0.1 255.0.0.0

Router(config-if)# no shutdown

Router(config-if)# exit

Router(config)# interface serial 0/1/0

Router(config-if)# ip address 20.0.0.1 255.0.0.0

Router(config-if)# no shutdown

Router(config-if)# exit

Router(config)# exit

Router# configure terminal

Router(config)# ip route 30.0.0.0 255.0.0.0 20.0.0.2

Router(config)# exit

ROUTER 1

Router> enable

Router# show ip interface brief

Router# configure terminal

Router(config)# interface fastethernet 0/0

Router(config-if)# ip address 30.0.0.1 255.0.0.0

Router(config-if)# no shutdown

Router(config-if)# exit

Router(config)# interface serial 0/1/0

Router(config-if)# ip address 20.0.0.2 255.0.0.0

Router(config-if)# no shutdown

Router(config-if)# exit

Router(config)# exit

Router# configure terminal

Router(config)# ip route 50.0.0.0 255.0.0.0 20.0.0.1

Router(config)# ip route 10.0.0.0 255.0.0.0 20.0.0.1

Router(config)# exit

Router# exit

ROUTER 0

Router# configure terminal

Router(config)# ip nat inside source static 10.0.0.2 50.0.0.3

Router(config)# interface fastethernet 0/0

Router(config-if)# ip nat inside

Router(config-if)# interface serial 0/1/0

Router(config-if)# ip nat outside

Router(config-if)# exit

Router(config)#exit

DYNAMIC NAT – TOPOLOGY CONFIGURATION

 

ROUTER 0

Router# configure terminal

Router(config)# interface fastethernet 0/0

Router(config-if)# ip address 10.0.0.65 255.0.0.0

Router(config-if)# no shutdown

Router(config-if)# exit

Router(config)# interface serial 0/1/0

Router(config-if)# ip address 20.0.0.1 255.0.0.0

Router(config-if)# exit

Router(config)# exit

Router# configure terminal

Router(config)#

Router(config)# ip route 30.0.0.0 255.0.0.0 20.0.0.2

Router(config)# exit

Router# configure terminal

Router(config)#access-list 1 permit 10.0.0.64 0.0.0.63

Router(config)# ip nat pool bhc 200.100.100.9 200.100.100.14 netmask 255.255.255.248

Router(config)# ip nat inside source list 1 pool bhc overload

Router(config)# interface fastethernet 0/0

Router(config-if)# ip nat inside

Router(config-if)# exit

Router(config)# interface serial 0/1/0

Router(config-if)# ip nat outside

Router(config-if)# exit

Router(config)# exit

ROUTER 1

Router# configure terminal

Router(config)# interface fastethernet 0/0

Router(config-if)# ip address 30.0.0.1 255.0.0.0

Router(config-if)# no shutdown

Router(config-if)# exit

Router(config)# interface serial 0/1/0

Router(config-if)# ip address 20.0.0.2 255.0.0.0

Router(config-if)# no shutdown

Router(config-if)# exit

Router(config)# exit